This fall I was inspired by a few Cathletes who were doing a "Time Travel" through Cathe's older workouts ... so October and November I rotated through a number of older series myself. I had fun doing the oldies, but I must say the LB workout that had my legs "talking" back to me was the LIS Tri-Sets LB - something about all those lower lunges just got to me, even though it doesn't really use heavier weights.